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Overview of Performing SIF Analysis

Performing SIF analysis involves studying system-level and related assets to determine loss of containment scenarios, identifying risk levels, and selecting the safety provisions that protect against or mitigate loss of containment. Optionally, the team can develop action plans for each failure mode. A recommended action is selected for the failure mode, for example, failure-finding maintenance or scheduled restoration. By adding indicators, corrective tasks, follow-up work, and procedural documents, the team develops reliability programs for preventing asset failures.

This topic summarizes the steps involved in recording a SIF analysis in APM. Links are provided to topics that describe each task.

Create the SIF Analysis and Select Assets

Creating the analysis involves selecting the primary asset to be analyzed, with or without its descendants, and selecting an analysis type, if appropriate. You can create the analysis from scratch or from a template. Analyses can be performed on all types of assets except components.

For more information:

•	Creating a SIF Analysis from Scratch

•	Creating a SIF Analysis From a Template

An analysis can also be created from an analysis request. For example, when an inspector reviews an indicator reading and decides that a failure mode review is required, the inspector can create a request for a strategy development analysis. When the request is processed, the analysis is created or updated. Information from the request is copied to the analysis: the requested start and completion dates are copied to the planning information on the General tab’s, Details tab. The Analysis Requests tab shows information about the original request.

It is a good idea to review a new analysis’ settings to ensure that they are appropriate for the asset and process. For more information:

•	Setting Failure Mode Options for a SIF Analysis

•	Setting Risk Analysis Options for a SIF Analysis

As the analysis progresses, you might wish to add assets to the analysis hierarchy that you identified when creating the analysis. You can also change the primary asset on an analysis and update the sequence numbers of assets in the analysis.

For more information:

•	Adding Assets to a SIF Analysis

•	Changing the Primary Asset on a SIF Analysis

•	Renumbering Assets and SIF Failure Modes

In some cases, assets are large enough to warrant separate analyses for different sections. For example, when the top portion of a large vessel contains gas and the bottom holds liquid, separate analyses or failure modes are needed to define and respond to different failure modes and effects. In this case, you can provide a description of the analysis scope. The same asset can be added to the analysis as many times as required, each with a difference scope description.

For more information, see Working with Asset Scope on a SIF Analysis.

Record the Primary Asset’s Operating Context

The analysis team will find it helpful to define the circumstances in which the assets operate before they develop failure modes and action plans. You can enter a detailed description of the operating context, including how and where the asset is used and the performance criteria that apply to output, throughput, safety, environmental integrity, and so on.

For more information:

•	Recording the Primary Asset’s Operating Context for a SIF Analysis

Manage the Analysis

APM provides tools to help you manage the analysis project, from recording team members, to documenting meetings, to recording comments. For more information:

•	Adding Team Members to a SIF Analysis

•	Entering and Reviewing Comments on a SIF Analysis

•	Recording Team Meetings on a SIF Analysis

•	Working with the SIF Analysis Checklist

Add and Analyze Failure Modes

Create or copy one or more failure modes. A failure mode is a single event that causes a functional failure. For example, if a fill level sensor fails, a tank can overflow, causing a safety hazard. For each failure mode, the safety analysis team identifies the unwanted situation, along with the HAZOP checklist item and inspection regime. They then analyze risk levels and select the safety provisions that protect against or mitigate loss of containment.

For more information:

•	Creating Unwanted Situations

•	Creating SIF Failure Modes

•	Copying SIF Failure Modes

•	Renumbering Assets and SIF Failure Modes

•	Performing SIF Failure Mode Risk Analysis

•	Adding Provisions to a SIF Failure Mode

Develop and Implement Action Plans

Optionally, the team can develop action plans and implement reliability programs to prevent asset failures. The team selects a recommended action from the list provided:

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Scheduled Restoration/Discard: Scheduled restoration entails restoring the initial capability of an existing asset at or before a specified age limit, regardless of its apparent condition at the time. Scheduled discard or replacement tasks entail discarding an asset at or before a specified age limit, regardless of its condition at the time.

•

Condition-Based Maintenance entails checking for potential failures so that action can be taken to prevent the functional failure or to avoid the consequences of the functional failure. On-condition tasks are so called because the items that are inspected are left in service on the condition that they continue to meet specified performance standards.

•	Failure-Finding Maintenance involves checking a hidden function at regular intervals to find out whether it has failed. The intervals are calculated based on the required availability of the asset and the reliability of the protected function.

•	Modification/Redesign is any one-time change to the equipment, training, maintenance or operating procedures, etc.

•	No Scheduled Maintenance means assets are left in service until a functional failure occurs, at which point they are repaired or replaced.

In some cases, you might need to create secondary action plans for failure modes. For example, a failure mode might require a condition-based maintenance task to check for signs of wear, a secondary modification to procedures (for example, training for maintenance personnel), and scheduled restoration in the future. You can add secondary actions as you are developing the analysis, or you can add them later.

For more information:

•	Developing Primary SIF Action Plans

•	Creating Secondary SIF Action Plans

•	Calculating a Failure-Finding Interval for a SIF Action Plan

Add Indicators to Action Plans

Depending on the type of action, you can create or select indicators to monitor assets for potential failure. When you have developed action plans, you can generate a report that shows how indicators are distributed on standard tasks.

For more information:

•	Adding Inspection Tasks and Indicators to SIF Action Plans

•	Reviewing Indicator Collection Information on a SIF Analysis

Add Tasks, Documents, and Work to Action Plans

Depending on the type of action, you can create or select one or more corrective tasks to support the recommended action. You can also assign work requests and work order tasks for follow-up work. If the asset is to be modified or redesigned, you can assign standard documents to the action plan.

For more information:

•	Adding Corrective Tasks to SIF Action Plans

•	Adding Follow-up Work to SIF Action Plans

•	Adding Standard Documents to SIF Action Plans

Monitor the Status of Analyses

Monitor the status of an analysis by reviewing failure modes and marking them “Facilitation Completed” and “Implementation Completed”. When implementation has been completed for all of its failure modes, change the analysis’ status to “Analysis Completed”.

If your organization uses the APM formal approval process, it is typically employed to vet the analysis when implementation has been completed for all failure modes. When the analysis has been approved, you can close the analysis.

You can define action plan task statuses for use with failure modes and action plans in addition to the statuses provided by APM (Facilitation Incomplete, Facilitation Completed, Implementation Completed, and Implementation Not Required). Facilitators and implementers can then use the additional statuses to co-ordinate their efforts, for example, marking an action plan for follow-up or review.

At any time, you can review analysis summaries or detailed information about an analysis’ status and history. You can also print SIF reports.

For more information:

•	Changing the Status of SIF Failure Modes and Analyses

•	Sending a SIF Analysis for Approval

•	Updating Study Status using a Change Set

•	Working with SIF Action Plan Task Statuses

•	Viewing Information About a SIF Analysis or Template

•	Reviewing SIF Assets’ Reliability Programs

•	Printing SIF Analysis Reports

Link Action Plans to Projects

When the recommended action is to modify or redesign the asset, you can link the action plan to a project to plan and track the modifications.

For more information:

•	Linking SIF Action Plans to Projects

•	Working With a Project’s Links to SIF Action Plans

Create SIF Templates

A SIF analysis template is a group of settings that can be used as the basis for an analysis. You can create templates and organize them in a hierarchy.

For more information:

•	Creating a SIF Template

•	Setting up a Hierarchy for SIF Templates

•	Viewing SIF Template Hierarchies

•	Moving a SIF Template to a Different Site